protected function _toSequenceString($in) { $imap_ob = $GLOBALS['injector']->getInstance('IMP_Factory_Imap')->create(); $str = ''; foreach ($in as $mbox => $ids) { $str .= '{' . strlen($mbox) . '}' . $mbox . $imap_ob->getIdsOb($ids)->tostring_sort; } return $str; }